When on an issue, add a new linked issue.
It used to auto populate so you did not have to fill in the whole thing. You could adjust to fit this new issue. A simple example, if I add a new linked issue, the subject does not even populate.
This just stopped working to day. I did it yesterday, several times. Coming in today, there has obviously been an update, but now this auto-population is broken. I rely heavily on this feature to keep everything connected properly but if I have to re-type the whole thing it is a waste of time.